The correct answer is: a) 2011.
The 2011 Census of India was the 14th national census conducted in India. The census was conducted by the Office of the Registrar General and Census Commissioner, India, a part of the Ministry of Home Affairs. The census was conducted from 9 February to 28 February 2011. The total population of India as per the 2011 census was 1,210,193,422.
The 2011 census was the first census in India to use the digital platform. The census data was collected using a mobile application called e-Census. The data was then processed and analyzed using a software called e-Census Data Processing System.
The 2011 census was a major undertaking that involved the participation of millions of people. The census data is used by the government for planning and development purposes. The data is also used by researchers and academics for studying various aspects of Indian society.
The 2011 census was a success and the data collected is of high quality. The data is being used by the government for planning and development purposes. The data is also being used by researchers and academics for studying various aspects of Indian society.
The other options are incorrect because:
- Option b) 2019 is incorrect because the 2011 census was the last census conducted in India.
- Option c) 2021 is incorrect because the 2021 census is not yet conducted.
- Option d) 2023 is incorrect because the 2023 census is not yet scheduled.